Factory worker Frank Taylor believes that he has missed out on a deserved promotion when it is instead given to a Polish immigrant. Angry and looking for a scapegoat, he is an ideal mark for the Black Legion, an underground group who want to get rid of immigrants and racial minorities through violent means. Frank joins the Legion, and with his new friends, he dons black robes and drives the Polish family from their home. His aim achieved, Frank gets his job, but soon the Legion begins to take up more of his time and money, and turns his character darker and darker. He leaves his wife, begins to drink heavily, and soon is on a downward spiral.